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A0427

PAYER POLICY CHANGES

A0427 Insurance Policy Changes

HCPCS A0427 is officially defined as "Ambulance service, advanced life support, emergency transport, level 1 (als 1 - emergency)." HCPCS A0427 is referenced in 11 tracked payer policy changes from Blue Cross Blue Shield of Rhode Island, Missouri Medicaid (MO HealthNet), and 7 other payers. For billers and coders, staying current on payer-specific coverage criteria, reimbursement rules, and prior-authorization requirements for HCPCS A0427 is critical to clean claim submission. Each entry below links to the full policy analysis with effective dates and action steps.

Blue Cross Blue Shield of Rhode Island · Effective Oct 1, 2025High impact
Medical policy updates
Several prior authorization and coverage changes for Medicare Advantage plans and commercial products took effect October 1, 2025 and November 1, 2025, and both dates are already effective as of the analysis date of 2026-11-05. Some CPT/HCPCS codes changed from requiring prior authorization to being covered, including IMRT and stereotactic body radiation therapy codes. Prior authorization was added for CPT 25447 and for CPT 22585, 22840 and 27280 for Medicare Advantage plans, and it was removed for CPT 63663 and 63664.
Missouri Medicaid (MO HealthNet) · Effective Jun 8, 2026Medium impact
Navigating the Miles How to Bill for Ground Ambulance Mileage
New policy clarifies ground ambulance mileage billing procedures, specifying that A0425 should be billed for one-way mileage from pickup to destination. The EP modifier must be applied to A0425 when billing Healthy Children and Youth (HCY) transports, but no modifiers should be used for other trip types.
Excellus BlueCross BlueShield · Effective Mar 19, 2026Medium impact
Ambulance: Land/Ground 10.01.07
Excellus policy 10.01.07 considers emergency land ambulance transport medically appropriate when the New York State mandate does not apply and all of the following are met: the ambulance service holds a certificate under the NYS Public Health Law, the ambulance has the necessary patient-care equipment and supplies, any other form of transportation would be medically contraindicated, and the patient is taken to the nearest hospital with appropriate facilities for the illness or injury. Non-emergent ambulance medical transport is medically appropriate under the same certification, equipment and contraindication criteria when the specialized service is at the nearest facility with the required capabilities and one of four listed indications applies, and elective or convenience transport is considered not medically necessary. The 03/19/26 annual review removed the criteria for urgent ambulance transportation and the criteria addressing cost effectiveness.
Missouri Medicaid (MO HealthNet) · Effective Jan 1, 2026Medium impact
CMS Approves Ground Ambulance Transport to Behavioral Health Crisis Centers (BHCCs) State Plan Amendment (SPA)
CMS approved a Missouri Medicaid State Plan Amendment effective January 1, 2026, authorizing MO HealthNet to reimburse ground ambulance providers for transports to Behavioral Health Crisis Centers (BHCCs) for patients with mental health or substance use disorder diagnoses in behavioral crisis. Billing teams must update systems to use specific HCPCS ambulance codes with modifier SD and place of service code 53, and ensure ambulance trip tickets are maintained.
Independence Blue Cross · Effective Oct 6, 2025Medium impact
12.04.02l, Ground Ambulance Services (Emergency and Nonemergency) (Independence)
Independence Blue Cross has published a standard policy review (no substantive changes) for ground ambulance services (emergency and nonemergency) effective 10/06/2025. The policy clarifies coverage criteria for emergency ground ambulance transport, paramedic intercept services, and Pennsylvania-specific nonemergency ground ambulance services without transportation. Billing teams should verify member eligibility and ensure claims include appropriate HCPCS codes (A0426, A0427, A0428, S0207) and supporting diagnosis codes.
Health Net · Effective Jun 27, 2025Medium impact
25-348 Avoid Unnecessary Denials and Claims Processing Delays by Following These Payment Policies
Health Net is implementing new payment edits effective June 27, 2025, including strict ambulance place of service coding requirements and updated medical necessity criteria for urodynamic testing and fundus photography. Claims not meeting these requirements will be denied.
Kansas Medicaid (KanCare) · Effective Jun 1, 2025Medium impact
KMAP BULLETIN: MediKan Ambulance Transport Coverage
Starting June 1, 2025, MediKan will no longer cover ambulance transport codes A0225, A0420, A0426, and A0428. Other ambulance codes (A0425, A0427, A0429, A0430, A0431, A0433, A0434, A0435, A0436) remain covered under existing policy provisions.
Blue Cross & Blue Shield of Mississippi · Identified Jun 20, 2026Medium impact
Ambulance and Medical Transport Services
Blue Cross Blue Shield of Mississippi covers ground emergency transport when the transport complies with applicable laws and licensing, has the necessary equipment, any other form of transportation would be medically contraindicated, and the patient is taken to the nearest hospital with appropriate facilities. Non-emergency ground transport between health care facilities requires prior authorization and must go to the nearest provider with the required capabilities, and non-emergency ground transport of bed-confined patients to a lower level of care requires that the patient meets the bed-confinement criteria and that the trip report describes symptoms, physical findings and monitoring. All air ambulance services require authorization, while transport to or from a physician's office, transport for routine renal dialysis, and transport by regularly scheduled commercial carrier are not covered.
Oregon Health Plan · Identified Jun 20, 2026Medium impact
Notice of intent — OHA proposes to update the calculation method for the fee-for-service ground emergency medical transportation (GEMT) supplemental payment for public emergency service providers in the Medicaid State Plan.
The Oregon Health Authority proposed updating the calculation method for the fee-for-service ground emergency medical transportation (GEMT) supplemental payment paid to public providers, meaning governments and federally recognized tribes. The new method would use standard add-on payments of $888.00 for procedure code A0429 and $842.00 for procedure code A0427 to supplement fee schedule rates. The current method is a cost report process, and the estimated annual Total Fund amount for this State Plan Amendment is $2,618,000.
BCBS Arizona · Identified Jun 16, 2026Medium impact
Ambulance Services
Air or water ambulance services to the nearest facility capable of providing appropriate treatment are medically necessary with documentation of ANY of the following: the emergency, accident or acute illness occurs in an area inaccessible by ground vehicles, or transport cannot be safely provided by ground ambulance due to great distances, prolonged transport time or other obstacles that would be harmful to the individual's medical condition. Ground ambulance services are medically necessary with documentation of ANY of the following: the individual's medical condition requires transport from the site of an emergency, accident or acute illness to the nearest facility capable of providing appropriate treatment, or interfacility transport for admission is needed when the transferring facility is unable to provide the level of service required. Transport provided primarily for the convenience of the individual, family or physician, transport to a physician's office, physical therapy, diagnostic or therapeutic services, home or other non-emergent outpatient services, and transport that would be otherwise appropriate in a stretcher van or wheelchair van are a benefit plan exclusion and not eligible for coverage.
Independence Blue Cross · Effective Sep 22, 2025Low impact
MA12.002e, Ground Ambulance Transport Services (Emergency and Nonemergency)
Independence Blue Cross MA12.002e policy reaffirms existing coverage criteria for ground and sea ambulance transport services (emergency and nonemergency) for Medicare Advantage members, effective 09/22/2025. The policy clarifies medical necessity requirements, coverage for deceased individuals, paramedic intercept services, inter-facility transfers, and specifies eligible HCPCS codes. This is a policy review/reissuance rather than a substantive change, maintaining alignment with Medicare coverage guidelines.

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REFERENCE DATA

Payers with rules4

Payers requiring prior auth4

Florida Blue · Effective March 27, 2026
Prior authorization required
Prior Authorization List: HMO – Marketplace Qualified Health Plans
BCBS Illinois · Effective January 1, 2026
Prior authorization required in some cases
2026 Commercial Outpatient Medical Surgical Prior Authorization Codes
CalViva Health · Effective December 31, 2025
Prior authorization required
CalViva Health CMS-0057-F prior authorization requirements

FREQUENTLY ASKED QUESTIONS

Does BCBS Illinois require prior authorization for A0427?

BCBS Illinois lists A0427 on 2026 Commercial Outpatient Medical Surgical Prior Authorization Codes for commercial plans, with conditions (list dated January 1, 2026). Verify with the payer before scheduling.

Does CalViva Health require prior authorization for A0427?

CalViva Health lists A0427 on CalViva Health CMS-0057-F prior authorization requirements for medicaid managed plans (list dated December 31, 2025). Verify with the payer before scheduling.

Does Community Health Plan of Imperial Valley require prior authorization for A0427?

Community Health Plan of Imperial Valley lists A0427 on Community Health Plan of Imperial Valley CMS-0057-F prior authorization requirements for medicaid managed plans (list dated December 31, 2025). Verify with the payer before scheduling.

Does Florida Blue require prior authorization for A0427?

Florida Blue lists A0427 on Prior Authorization List: HMO – Marketplace Qualified Health Plans for exchange plans (list dated March 27, 2026). Verify with the payer before scheduling.

What insurance policy changes affect HCPCS A0427?

There are 11 tracked policy changes affecting HCPCS A0427, including updates from Blue Cross Blue Shield of Rhode Island, Missouri Medicaid (MO HealthNet), Excellus BlueCross BlueShield. Each change may modify coverage criteria, reimbursement rates, or prior-authorization requirements.

Which payers have updated policy for HCPCS A0427?

Payers that have issued tracked updates for HCPCS A0427 include: Blue Cross Blue Shield of Rhode Island, Missouri Medicaid (MO HealthNet), Excellus BlueCross BlueShield, Independence Blue Cross, Health Net, Kansas Medicaid (KanCare), Blue Cross & Blue Shield of Mississippi, Oregon Health Plan, BCBS Arizona.

How do I get notified when HCPCS A0427 policy changes?

Create a free account at PolicyChanges.app and save a search filtered to HCPCS A0427. You will get an email when new policy changes reference this code: daily or weekly, your choice, on every plan.

Why do payers change policies for HCPCS A0427?

Payers revise policies for individual billing codes to align with updated clinical guidelines, CMS rule changes, fraud and abuse prevention measures, or network cost-management goals. Changes can affect medical necessity criteria, place-of-service restrictions, bundling rules, or whether a code requires prior authorization.

See every payer rule for A0427

Prior authorization lists, coverage criteria, NCCI edits and Medicare coverage articles for A0427 in one place.

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All billing codes J3590 C9399 J3490 99215 99213 99202

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Medical policy updates

Navigating the Miles How to Bill for Ground Ambulance Mileage

Ambulance: Land/Ground 10.01.07

CMS Approves Ground Ambulance Transport to Behavioral Health Crisis Centers (BHCCs) State Plan Amendment (SPA)

12.04.02l, Ground Ambulance Services (Emergency and Nonemergency) (Independence)

25-348 Avoid Unnecessary Denials and Claims Processing Delays by Following These Payment Policies

KMAP BULLETIN: MediKan Ambulance Transport Coverage

Ambulance and Medical Transport Services

Notice of intent — OHA proposes to update the calculation method for the fee-for-service ground emergency medical transportation (GEMT) supplemental payment for public emergency service providers in the Medicaid State Plan.

Ambulance Services

MA12.002e, Ground Ambulance Transport Services (Emergency and Nonemergency)

Prior authorization required

Prior authorization required in some cases